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Natalia%20Tyurina

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The X-ray spectrum covering the time period from T 67s to T 878s is well fit by ... A SOFT GAMMA-RAY REPEATER. IN THE GALAXY M81? ... – PowerPoint PPT presentation

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Title: Natalia%20Tyurina


1
Sternberg Astronomical Institue GRB Folow-up
optical observations By MASTER 2002-2008
  • Natalia Tyurina
  • Behalf of the MASTER-team
  • http//observ.pereplet.ru

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????? ????????
4
GCN Sites
  • Optical robot-teleskopes
  • GROCSE (LLNL U.Mich.) LOTIS (LLNL
    Clemson) ROTSE TAROT LOTOSS/KAIT ETC
    (MIT) NEAT The BRADFORD telescope (U.of
    Bradford, England) Wyoming IR Obs
    (S.Howell) LONEOS Beijing Xinglong
    Observatory BOOTES (Spain, Castro-Tirado) APT
    (Australia) NYTT (Finland) ASAS MERCATOR (La
    Palma) REM (Italy) BART (Czech Rep.) MASTER
    (Russia) Grove Creek Obs (Australia)

5
  • Moscow-Vostryakovo
  • Since 2002
  1. ???????? ???????????????? ???????
    ???????-????????, D355 ?? D/F2.3 ???????? ???
    Apogee Alta U16 ???? ?????? 6 ?????????? ????????

6
MASTER in Winter
7
MASTER MOSCOW-VOSTRYKOVO
  • Very bad astro climate
  • 2 ?? ?? ????????? (????????)
  • Less than 70 nights per yr (most in summer
    ????? ????)
  • ???? ?????? ? ???, ??? ?????? ?? ??????, ???
    ????????? ?? ???? ??????? ????????????????
    ???????? ? ??????? ???????? ????

8
???? ??????
M A S T E R R O T S E
  • ???? ?? ?????? ???????????, ?????????? ??
    ????????? ??????? ???????-???????? (355??) ?
    ??????? ???????? AP16E (2003 ???)
  • ??????, ????????? ROTSE III http//www.rotse.net

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??? ???????? ?????? ???????? ?????
11
GRB 030329
12
Starting at the beginning of 2005, the
Moscow-Vostryakovo MASTER station carried out
observations of 31 GRBs (Table 2). In 16 cases,
we obtained the first upper limits on the optical
fluxes of the GRBs, i.e., fluxes brighter than
which no optical candidate for the GRB was
detected.
13
GRB 050824
14
GRB 060926 Optical flare discovery Lipunov et
al., 2007ARep.,Vol. 51, p.1004
  • MASTER robotic system (http//observ.pereplet.ru)
    responded to GRB060926 (Holland et al., GCN Circ
    5612) under the good conditions (V. Lipunov et
    al., GCN Circ 5632). The first image was started
    at 2006-09-26 164957 UT, 76 s after the GRB
    time (355 mm telescope, 6 square degrees FOV,
    2.1'' per pix, CCD Alta U16). The unfiltered
    image is calibrated relative to USNO A2.0 (0.8 R
    0.2 B). We find (Lipunov et al., GCN5632) faint
    OT on the first and on the coadded images at
    position aplha 17 35 43.66 dec 13 02 18.3
    err - 0.7'' wich coincided with the Holland et
    al.(GCN Circ 5612) OT position.

15
GRB060926
16
GRB 060926 Optical-X-ray spectra power low
determination The X-ray spectrum covering the
time period from T67s to T878s is well fit by
an absorbed power-law with a photon index of
2.1(/-0.3) and column density of (2.2/-0.9)e21
cm-2 (Swift, M. Perri et al., GCN 5622). They
note the Galactic column density in the direction
of the source is 7.3e20 cm-2 . This means that
absorbtion is about 1 magnitude in our band. The
optical-xray data is well fit by power-low with a
photon index of 1.7-0.2 during all our time
observation.
17
GRB 060926
18
Discovery of an optical flare from GRB 060926 by
the MASTER robotic telescope Possible formation
of a marginally rotating black hole
2008AstL...34..145L The MASTER robotic
telescope has obtained the first optical images
of GRB 060926. We have discovered an optical
flare from GRB 060926, a recurrent brightening
that closely follows its behavior in the X-ray
range. We have determined the spectral slope for
GRB 060926 from the X-ray to optical range in the
first minutes. Based on the spinar model, we show
that the parameters of the optical and X-ray
flares suggest that the gamma-ray burst resulted
from the core collapse of a 7 M ? star with an
initial effective Kerr parameter of 7.6 and an
initial magnetic-to-gravitational energy ratio of
10-4.
19
Theoretical interpretationSpinar Model for GRB
(Lipunov Gorbovskoy, 2007, ApJ.,665L.,97L)
The model parameters 1) Specific Kerr parameter

2) Magnetic Gravitational energy ratio
M7Msun , a07.6 ? am 10-4
20
THE SHORT BURST GRB 051103 A SOFT GAMMA-RAY
REPEATER IN THE GALAXY M81? MASTER robotic
system (http//observ.pereplet.ru) responded to
GRB051103.4 (GRB_TIME is 2005-11-03 092543.785,
S. Golenetskii et al., GCN4197) at several
minutes after GCN Circ4197 time (GCN4198). The
first image (6 square degrees) was at 2005-11-05
195547 UT, 2 days 103003.215 after the GRB
time. We have 36 images with total exposition
1080 s between 195547 - 214517 on 6 square
degrees area. The robot not find OT-candidate in
IPN error box.
21
Triangulation Short burst GRB 051103
22
????? ???? 2004-2008??. 80 000 ???????????? ?
???????? ??????? ???????????
23
???????? ???????? ??????????????? ??????????
???????????? ??????
  • ????????????? ????????-????? ?????? II (D400mm)
  • 1200 ??.??. ?? 1 ??? ?? 17 ??. ???..
  • ???????????????? ?????? ???????????
    ????
  • ?????? VWF
  • 1000 ??.??. ?? 12 ??.???????? ?? 1 ?.

24
?????? ???? ??? ???????, 2008
  • December 2008 - Dream in iron

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?????? ?????????? ?????????? ?? ????????? ??????
?????? ????? ???????, 2008 ????? ??????? ?????,
??????????? ?? ???? ???????? ??????
28
?????? II - ???? ?????? 2008 ?.
?????? II 1200 ??.??. ? ??? ?? 16 ??.???.
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??????-????
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